Functional and decorative plastic parts for automobiles manufactured using a special technology to reduce the incidence of defects, namely, interior plastic decorative and protective trim for the instrument panel, interior decorative trim for the front and rear doors, glovebox, center stack bezel, cluster bezel, floor console, cupholder, overhead console, radio bezel, rear seat console, rear seat cupholder, and air vent coverings, all being structural parts of automobiles